[51.20] Performance of the High Energy X-Ray Timing Experiment on XTE

M.Pelling, D.Gruber, P.Hink, R.Rothschild (UCSD)

The High Energy X-Ray Timing Experiment (HEXTE) instrument is nearing
completion and is scheduled for launch in August, 1995 on the X-Ray
Timing Explorer (XTE). As part of an instrument complement designed
to study the temporal and spectral characteristics of the X-ray sky,
the HEXTE features large collecting area and low background with
careful control of systematic effects for observations in the 15 to
200 keV energy range. The operating characteristics of the flight
subsystems, including phoswich detectors, anticoincidence shields,
gain control and aperture modulation components are described.
Quantitative performance results are given which indicate that the
HEXTE will meet or exceed its design goals.